639547352 has 16 divisors (see below), whose sum is σ = 1211025600. Its totient is φ = 316607200.

The previous prime is 639547351. The next prime is 639547387. The reversal of 639547352 is 253745936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639547351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394952 + ... + 396567.

It is an arithmetic number, because the mean of its divisors is an integer number (75689100).

Almost surely, 2^639547352 is an apocalyptic number.

It is an amenable number.

639547352 is a deficient number, since it is larger than the sum of its proper divisors (571478248).

639547352 is a wasteful number, since it uses less digits than its factorization.

639547352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791626 (or 791622 counting only the distinct ones).

The product of its digits is 680400, while the sum is 44.

The square root of 639547352 is about 25289.2734573376. The cubic root of 639547352 is about 861.5706613145.

The spelling of 639547352 in words is "six hundred thirty-nine million, five hundred forty-seven thousand, three hundred fifty-two".